变速箱壳体加工工艺外文翻译.docx
- 文档编号:2722310
- 上传时间:2023-05-04
- 格式:DOCX
- 页数:10
- 大小:21.66KB
变速箱壳体加工工艺外文翻译.docx
《变速箱壳体加工工艺外文翻译.docx》由会员分享,可在线阅读,更多相关《变速箱壳体加工工艺外文翻译.docx(10页珍藏版)》请在冰点文库上搜索。
变速箱壳体加工工艺外文翻译
本科毕业设计(论文)
(外文翻译)
题目75拖拉机变速箱壳体机械加工工艺规程设计
学生姓名XXXXXX
专业班级机械设计制造及其自动化(本科二班)
学号200933080
院(系)机械工程学院
指导教师(职称)XXXXXX
二○一三年五月十八日
Gearboxshellmachiningprocessdesign
《ManufacturingEngineeringandTechnology—Machining》
MechanicalIndustryPressInMarch2004,version1p560—564
(Seropekalpakjian)(StevenR.Schmid)
Abstract
Gearboxshellisamorecomplexstructureofsparepartsbox,itshighprecision,complexprocess,andtheprocessingqualitywillaffecttheoverallperformanceengine,soithasbecometheenginemanufacturer'sfocuspartsone.Machiningprocessplanningmustguaranteethemachiningqualityofparts,tomeetthetechnicalrequirementsstipulatedindrawings,atthesametimeshouldalsohavehighproductivityandefficiency.Therefore,machiningprocessplanningdesignisanimportantwork,requiresdesignersmusthavearichexperienceinproductionpracticeandwiderangeofmechanicalmanufacturingtechnologybasictheoryknowledge.Inthespecifiedprocedure,shouldaccordingtotheproductionofpartsandtheexistingequipmentconditions,takingtheprocessingqualityintoaccount,productivityandeconomyrequirements,afterrepeatedanalysisandcomparison,todeterminetheoptimalorthebestsolution.
1.TechnicalCharacteristicsofthegearboxshell
Thegearboxshellprocessfeaturesare:
thestructureofcomplexshape;processingplane,morethanholes;unevenwallthicknessandstiffnessislow;processingofhighprecisiontypicalofbox-typeprocessingpart.Themainprocessingofthesurfaceofcylinderblocktopsurface,themainbearingside,cylinderbore,themainandcamshaftbearingboreholesandsoon,theywilldirectlyaffectthemachiningaccuracyoftheengineassemblyprecisionandperformance,mainlyrelyonprecisionequipment,industrialfixturesreliabilityandprocessingtechnologytoensurethereasonableness.
2.Thegearboxshellprocessdesignprinciplesandthebasis
DesignTechnologyprogramshouldbetoensureproductqualityatthesametime,givefullconsiderationtotheproductioncycle,costandenvironmentalprotection;basedontheenterprisesabilitytoactivelyadoptadvancedprocesstechnologyandequipment,andconstantlyenhancetheirleveloftechnology.Gearboxshellmachiningprocessdesignshouldfollowthefollowingbasicprinciples:
2.1Theselectionofprocessingequipment
Theprincipleofselectionadoptedtheprincipleofselectionadoptedtheprincipleofcombiningrigid-flexible,processingeachhorizontalmachiningcenterislocatedmainlysmalloperationswithverticalmachiningcenter,thekeyprocessacrankhole,cylinderhole,balancershaftholeHigh-speedprocessingofhigh-precisionhorizontalmachiningcenter,anupperandlowernon-criticalprocessesbeforeandafterthefour-dimensionalhigh-efficiencyroughmillingandhaveacertainadjustmentrangeofspecialmachineprocessing;
2.2Concentrationprocessprinciple
Focusonakeyprocessinprincipleprocessthebodycylinderbore,crankshafthole,BalanceShaftholesurfacefinishingandthecombinationofprecisionmillingcylinderhead,usingaprocessfocusedonasetupprogramtocompleteallprocessingelementsinordertoensureproductaccuracyThekeyqualityprocessestomeetthecylindercapacityandtherelevanttechnicalrequirements;
3.Thegearboxshellmachiningprocessdesignthemaincontent
Gearboxshellcomplexstructure,highprecision,argesize,isthin-walledparts,thereareanumberofhighprecisionplaneandholes.Engineblockmachiningprocesscharacteristics;mainlyflatandtheholeprocessing,processingofflatgenerallyuseplaning,millingmethodssuchasprocessing,processingofholeusedmainlyboring,processingandmulti-purposedrillingholes.Asthecylindercomplexstructure.sohowtoensurethatthemutualpositionofthesurfaceprocessingprecisionisanimportantissue.
3.1Theselectionofblank
GearboxshellonthematerialsusedaregenerallygraycastironHT150,HT200,HT250,thereisalsocastaluminumorsteelplate,thisengineblockusinghigh-strengthalloycastiron.Cylinderintheprocessingpriortoagingtreatmentinordertoeliminatestressandimprovetheroughcastingmechanicalproperties.
Improvetheroughaccuracy,reductionofmachiningallowance,istoimprovetheautomatedproductionlinesystemproductivityandprocessingqualityoftheimportantmeasures.Astheforeignbox-typepartsofroughqualityandhighprecision,anditsproduction-linesystemhasbeenimplementeddirectlyontheblankline,notonlyeliminatingtheneedforblankcheckdevicealsosavestheroughqualityproblemsduetowasteofmachiningtime,increaseoverallefficiency.Therefore,therefinementofroughistoimprovetheproductivityofthemostpromisingwayout.Fortheengineblockproductionline,canberoughinpartson-linepre-millingsixface,removingmostofthemargin,tofacilitatedirecton-lineparts.
3.2Machiningprocessselectionandprocessingofthebenchmark
Choosetherightprocessingtechnologybaseisdirectlyrelatedtotheprocessingqualitycanensuretheparts.Generallyspeaking,processbenchmarkingcanbedividedintocoarseandfinereferencebase.
3.2.1Coarsereferencebase
Thebaselinefortheon-linethickrough,whichisparticularlyimportantthechoiceofbenchmarkcrude,ifcrudebenchmarkchoiceunreasonable,willtheunevendistributionofmachiningallowance,processingandsurfaceoffsets,resultinginwaste.Inthecylinderproductionline,wehaveadoptedforthecoarsesideofthebase;
3.2.2Finereferencebase
Refinedthebaseofthisboxfortheengineblockparts,thegeneraluseof"sidetwosales"forafullrangeofuniformbenchmarks,Forthelongerautomatedproductionpositioning.Inthegearboxshelloftheprocess,wehaveadoptedtotheside,bottomandthespindleholepositioning,intheprocessingcenterontheprocess.
3.3MachiningProcessingStagesandprocessesofthearrangements
Oftenapartofmanyapparentneedforprocessing,ofcourse,thesurfacemachiningaccuracyaredifferent.Processingofhighprecisionsurface,oftenafterrepeatedprocessing;Asfortheprocessingofthesurfaceoflowprecision,onlyneedtogothroughoneortwoonthelist.Thus,whenthedevelopmentprocessinordertoseizethe"processinghighprecisionsurface,"thisconflict,thereasonablearrangementprocessesandrationaldivisionstageofprocessing.Arrangetheorderoftheprincipleofprocessis:
afterthefirstcoarserefined,thefirstsurfaceafterthehole,thefirstbenchmarkother.Intheengineblockmachining,thesameshouldfollowthisprinciple.
3.3.1roughingstageengineblockmachiningprocess
Thearrangementsforroughingprocess,tofullycarryoutroughrough,trimmostofthemargininordertoensureproductionefficiency;
3.3.2semi-finishingphaseoftheengineblockmachining
Inordertoensuretheaccuracyofthemiddleofsomeimportantsurfaceprocessing,andarrangesomesemi-finishingoperations,willberequiredaccuracyandsurfaceroughnessofthesurfaceofthemiddleofsomeprocessingtocomplete,whiledemandingthesurfaceofsemi-finished,toprepareforfuturefinishing;
3.3.3Thefinishingstage
Thefinishingstageofrequiringhighaccuracyandsurfaceroughnessofthesurfaceprocessing;
3.3.4secondaryprocessing
Secondaryprocessingsuchassmallsurfacescrewholes,youcanfinishofthemajorsurfaceaftertheonehand,whentheworkpiecedeformationprocesslittleimpactatthesametimealsoreducedtherejectionrate;Inaddition,ifthemainsurfaceofawaste,thesesmallthesurfacewillnothavetobeprocessed,thusavoidingawasteofman-hours.However,iftheprocessingisveryeasyforasmallsurfacebumpsthemainsurface,itshouldbeplacedonasmallsurfacefinishpriortothemainsurfacefinishing;
3.3.5makeproperarrangementsforsecondaryprocesses
Makeproperarrangementsforsecondaryprocessessuchasproductinspectionprocess,inpartroughingstage,thekeyprocessbeforeandafterprocessing,sparepartsalltheprocessinghasbeencompleted,shouldbeappropriatearrangements.
Stageofprocessingdivision,hasthefollowingadvantages:
First,itcantakemeasurestoeliminatetheroughworkpieceafterthestress,toensureaccuracy;second,finishingontheback,andwillnotdamageduringtransportthesurfaceoftheworkpiecehasbeenprocessed;again,firstroughingthesurfacedefectscanbedetectedearlyandpromptlydealwithrough,donotwasteworkinghours.Butmostsmallparts,donotsubverythin.
3.4Thegearboxshellsurfaceofthemainprocessingandsecondaryprocesses
3.4.1Planeprocessing
Planeprocessingatpresent,themillingofengineblocksistheprimarymeansofplanarprocessing,domesticmillingfeedrateisgenerally300-400mm/min,andforeign2000-4000mm/minmillingfeedratecomparedtofarcry,tobeonincreasing,therefore,improvethemillingfeedrate,reduceoverheadtimeistoimprovetheproductivityofthemajormeansoffinishinganumberofplaneengineblockwhenthemillingfeedratetoreach2399mm/min,greatlyimprovedefficiency;
Topsurfaceofthecylindermillingisakeyprocessintheprocess,theflatnessrequirementsfor0.02/145mm,thesurfaceroughnessofRa1.6um.Processinginthecylinder,theuseofsideandspindlebearingborepositioning,top,bottomandmiddlevagayonlyaperturewhileprocessingusedintheprocessinglineoutsideoftheknifedevicecanbettermeettheengineblockmachiningaccuracy;
3.4.2GeneralholesMachining
GeneralholesMachiningholesingeneralarestillusingthetraditionalprocessingofdrilling,expansion,boring,reaming,tappingandothercraftapproach.Issuesinthedesignprocessofspecificprogr
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 变速箱 壳体 加工 工艺 外文 翻译